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gnome-control-center/panels/background/bg-pictures-source.c
Silvère Latchurié 5508226405 background: handle EXIF orientation in chooser 
The chooser ignores EXIF orientations embedded in the pictures when the
thumbnails are generated.

Because the EXIF informations are available after the file has been
loaded, it has to be reloaded if the transformed dimensions don't
match the thumbnails constraints.

The transformations are directly applied for EXIF orientations 1, 2,
3 and 4. For EXIF orientations 5, 6, 7 and 8, the pictures are reloaded
with swapped dimensions before the transformations are applied.

https://bugzilla.gnome.org/show_bug.cgi?id=783200
2017-06-07 18:24:26 +02:00

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/* bg-pictures-source.c */
/*
* Copyright (C) 2010 Intel, Inc
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Thomas Wood <thomas.wood@intel.com>
*
*/
#include <config.h>
#include "bg-pictures-source.h"
#include "cc-background-grilo-miner.h"
#include "cc-background-item.h"
#include <string.h>
#include <cairo-gobject.h>
#include <gio/gio.h>
#include <grilo.h>
#include <libgnome-desktop/gnome-desktop-thumbnail.h>
#include <gdesktop-enums.h>
G_DEFINE_TYPE (BgPicturesSource, bg_pictures_source, BG_TYPE_SOURCE)
#define PICTURES_SOURCE_PRIVATE(o) \
(G_TYPE_INSTANCE_GET_PRIVATE ((o), BG_TYPE_PICTURES_SOURCE, BgPicturesSourcePrivate))
#define ATTRIBUTES G_FILE_ATTRIBUTE_STANDARD_NAME "," \
G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE "," \
G_FILE_ATTRIBUTE_TIME_MODIFIED
struct _BgPicturesSourcePrivate
{
GCancellable *cancellable;
CcBackgroundGriloMiner *grl_miner;
GnomeDesktopThumbnailFactory *thumb_factory;
GFileMonitor *picture_dir_monitor;
GFileMonitor *cache_dir_monitor;
GHashTable *known_items;
};
const char * const content_types[] = {
"image/png",
"image/jp2",
"image/jpeg",
"image/bmp",
"image/svg+xml",
"image/x-portable-anymap",
NULL
};
const char * const screenshot_types[] = {
"image/png",
NULL
};
static char *bg_pictures_source_get_unique_filename (const char *uri);
static void picture_opened_for_read (GObject *source_object, GAsyncResult *res, gpointer user_data);
static void
bg_pictures_source_dispose (GObject *object)
{
BgPicturesSourcePrivate *priv = BG_PICTURES_SOURCE (object)->priv;
if (priv->cancellable)
{
g_cancellable_cancel (priv->cancellable);
g_clear_object (&priv->cancellable);
}
g_clear_object (&priv->grl_miner);
g_clear_object (&priv->thumb_factory);
G_OBJECT_CLASS (bg_pictures_source_parent_class)->dispose (object);
}
static void
bg_pictures_source_finalize (GObject *object)
{
BgPicturesSource *bg_source = BG_PICTURES_SOURCE (object);
g_clear_object (&bg_source->priv->thumb_factory);
g_clear_pointer (&bg_source->priv->known_items, g_hash_table_destroy);
g_clear_object (&bg_source->priv->picture_dir_monitor);
g_clear_object (&bg_source->priv->cache_dir_monitor);
G_OBJECT_CLASS (bg_pictures_source_parent_class)->finalize (object);
}
static void
bg_pictures_source_class_init (BgPicturesSourceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
g_type_class_add_private (klass, sizeof (BgPicturesSourcePrivate));
object_class->dispose = bg_pictures_source_dispose;
object_class->finalize = bg_pictures_source_finalize;
}
static void
remove_placeholder (BgPicturesSource *bg_source, CcBackgroundItem *item)
{
GtkListStore *store;
GtkTreeIter iter;
GtkTreePath *path;
GtkTreeRowReference *row_ref;
store = bg_source_get_liststore (BG_SOURCE (bg_source));
row_ref = g_object_get_data (G_OBJECT (item), "row-ref");
if (row_ref == NULL)
return;
path = gtk_tree_row_reference_get_path (row_ref);
if (!gtk_tree_model_get_iter (GTK_TREE_MODEL (store), &iter, path))
return;
gtk_list_store_remove (store, &iter);
}
static gboolean
picture_needs_rotation (GdkPixbuf *pixbuf)
{
const gchar *str;
str = gdk_pixbuf_get_option (pixbuf, "orientation");
if (str == NULL)
return FALSE;
if (*str == '5' || *str == '6' || *str == '7' || *str == '8')
return TRUE;
return FALSE;
}
static GdkPixbuf *
swap_rotated_pixbuf (GdkPixbuf *pixbuf)
{
GdkPixbuf *tmp_pixbuf;
tmp_pixbuf = gdk_pixbuf_apply_embedded_orientation (pixbuf);
if (tmp_pixbuf == NULL)
return pixbuf;
g_object_unref (pixbuf);
return tmp_pixbuf;
}
static void
picture_scaled (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
BgPicturesSource *bg_source;
CcBackgroundItem *item;
GError *error = NULL;
GdkPixbuf *pixbuf = NULL;
const char *software;
const char *uri;
GtkTreeIter iter;
GtkTreePath *path;
GtkTreeRowReference *row_ref;
GtkListStore *store;
cairo_surface_t *surface = NULL;
int scale_factor;
gboolean rotation_applied;
item = g_object_get_data (source_object, "item");
pixbuf = gdk_pixbuf_new_from_stream_finish (res, &error);
if (pixbuf == NULL)
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
g_warning ("Failed to load image: %s", error->message);
remove_placeholder (BG_PICTURES_SOURCE (user_data), item);
}
g_error_free (error);
goto out;
}
/* since we were not cancelled, we can now cast user_data
* back to BgPicturesSource.
*/
bg_source = BG_PICTURES_SOURCE (user_data);
store = bg_source_get_liststore (BG_SOURCE (bg_source));
uri = cc_background_item_get_uri (item);
if (uri == NULL)
uri = cc_background_item_get_source_url (item);
/* Ignore screenshots */
software = gdk_pixbuf_get_option (pixbuf, "tEXt::Software");
if (software != NULL &&
g_str_equal (software, "gnome-screenshot"))
{
g_debug ("Ignored URL '%s' as it's a screenshot from gnome-screenshot", uri);
remove_placeholder (BG_PICTURES_SOURCE (user_data), item);
goto out;
}
/* Process embedded orientation */
rotation_applied = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (item), "rotation-applied"));
if (!rotation_applied && picture_needs_rotation (pixbuf))
{
/* the width and height of pixbuf we requested are wrong for EXIF
* orientations 5, 6, 7 and 8. the file has to be reloaded. */
GFile *file;
file = g_file_new_for_uri (uri);
g_object_set_data (G_OBJECT (item), "needs-rotation", GINT_TO_POINTER (TRUE));
g_object_set_data_full (G_OBJECT (file), "item", g_object_ref (item), g_object_unref);
g_file_read_async (G_FILE (file), G_PRIORITY_DEFAULT,
bg_source->priv->cancellable,
picture_opened_for_read, bg_source);
g_object_unref (file);
goto out;
}
pixbuf = swap_rotated_pixbuf (pixbuf);
scale_factor = bg_source_get_scale_factor (BG_SOURCE (bg_source));
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, scale_factor, NULL);
cc_background_item_load (item, NULL);
row_ref = g_object_get_data (G_OBJECT (item), "row-ref");
if (row_ref == NULL)
{
/* insert the item into the liststore if it did not exist */
gtk_list_store_insert_with_values (store, NULL, -1,
0, surface,
1, item,
-1);
}
else
{
path = gtk_tree_row_reference_get_path (row_ref);
if (gtk_tree_model_get_iter (GTK_TREE_MODEL (store), &iter, path))
{
/* otherwise update the thumbnail */
gtk_list_store_set (store, &iter,
0, surface,
-1);
}
}
g_hash_table_insert (bg_source->priv->known_items,
bg_pictures_source_get_unique_filename (uri),
GINT_TO_POINTER (TRUE));
out:
g_clear_pointer (&surface, (GDestroyNotify) cairo_surface_destroy);
g_clear_object (&pixbuf);
}
static void
picture_opened_for_read (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
BgPicturesSource *bg_source;
CcBackgroundItem *item;
GFileInputStream *stream;
GError *error = NULL;
gint thumbnail_height;
gint thumbnail_width;
gboolean needs_rotation;
item = g_object_get_data (source_object, "item");
stream = g_file_read_finish (G_FILE (source_object), res, &error);
if (stream == NULL)
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
char *filename = g_file_get_path (G_FILE (source_object));
g_warning ("Failed to load picture '%s': %s", filename, error->message);
remove_placeholder (BG_PICTURES_SOURCE (user_data), item);
g_free (filename);
}
g_error_free (error);
return;
}
/* since we were not cancelled, we can now cast user_data
* back to BgPicturesSource.
*/
bg_source = BG_PICTURES_SOURCE (user_data);
needs_rotation = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (item), "needs-rotation"));
if (needs_rotation)
{
/* swap width and height for EXIF orientations that need it */
thumbnail_width = bg_source_get_thumbnail_height (BG_SOURCE (bg_source));
thumbnail_height = bg_source_get_thumbnail_width (BG_SOURCE (bg_source));
g_object_set_data (G_OBJECT (item), "rotation-applied", GINT_TO_POINTER (TRUE));
}
else
{
thumbnail_width = bg_source_get_thumbnail_width (BG_SOURCE (bg_source));
thumbnail_height = bg_source_get_thumbnail_height (BG_SOURCE (bg_source));
}
g_object_set_data_full (G_OBJECT (stream), "item", g_object_ref (item), g_object_unref);
gdk_pixbuf_new_from_stream_at_scale_async (G_INPUT_STREAM (stream),
thumbnail_width, thumbnail_height,
TRUE,
bg_source->priv->cancellable,
picture_scaled, bg_source);
g_object_unref (stream);
}
static void
picture_copied_for_read (GObject *source_object,
GAsyncResult *res,
gpointer user_data)
{
BgPicturesSource *bg_source;
CcBackgroundItem *item;
GError *error = NULL;
GFile *thumbnail_file = G_FILE (source_object);
GFile *native_file;
if (!g_file_copy_finish (thumbnail_file, res, &error))
{
if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
goto out;
else if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_EXISTS))
{
gchar *uri;
uri = g_file_get_uri (thumbnail_file);
g_warning ("Failed to download '%s': %s", uri, error->message);
g_free (uri);
goto out;
}
}
bg_source = BG_PICTURES_SOURCE (user_data);
native_file = g_object_get_data (G_OBJECT (thumbnail_file), "native-file");
item = g_object_get_data (G_OBJECT (thumbnail_file), "item");
g_object_set_data_full (G_OBJECT (native_file), "item", g_object_ref (item), g_object_unref);
g_file_read_async (native_file,
G_PRIORITY_DEFAULT,
bg_source->priv->cancellable,
picture_opened_for_read,
bg_source);
out:
g_clear_error (&error);
}
static gboolean
in_content_types (const char *content_type)
{
guint i;
for (i = 0; content_types[i]; i++)
if (g_str_equal (content_types[i], content_type))
return TRUE;
return FALSE;
}
static gboolean
in_screenshot_types (const char *content_type)
{
guint i;
for (i = 0; screenshot_types[i]; i++)
if (g_str_equal (screenshot_types[i], content_type))
return TRUE;
return FALSE;
}
static cairo_surface_t *
get_content_loading_icon (BgSource *source)
{
GtkIconTheme *theme;
GtkIconInfo *icon_info;
GdkPixbuf *pixbuf, *ret;
GError *error = NULL;
int scale_factor;
cairo_surface_t *surface;
int thumbnail_height;
int thumbnail_width;
theme = gtk_icon_theme_get_default ();
icon_info = gtk_icon_theme_lookup_icon (theme,
"content-loading-symbolic",
16,
GTK_ICON_LOOKUP_FORCE_SIZE | GTK_ICON_LOOKUP_GENERIC_FALLBACK);
if (icon_info == NULL)
{
g_warning ("Failed to find placeholder icon");
return NULL;
}
pixbuf = gtk_icon_info_load_icon (icon_info, &error);
if (pixbuf == NULL)
{
g_warning ("Failed to load placeholder icon: %s", error->message);
g_clear_error (&error);
g_clear_object (&icon_info);
return NULL;
}
thumbnail_height = bg_source_get_thumbnail_height (source);
thumbnail_width = bg_source_get_thumbnail_width (source);
ret = gdk_pixbuf_new (GDK_COLORSPACE_RGB,
TRUE,
8, thumbnail_width, thumbnail_height);
gdk_pixbuf_fill (ret, 0x00000000);
/* Put the icon in the middle */
gdk_pixbuf_copy_area (pixbuf, 0, 0,
gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf),
ret,
(thumbnail_width - gdk_pixbuf_get_width (pixbuf)) / 2,
(thumbnail_height - gdk_pixbuf_get_height (pixbuf)) / 2);
g_object_unref (pixbuf);
scale_factor = bg_source_get_scale_factor (source);
surface = gdk_cairo_surface_create_from_pixbuf (ret, scale_factor, NULL);
g_object_unref (ret);
g_clear_object (&icon_info);
return surface;
}
static GFile *
bg_pictures_source_get_cache_file (void)
{
char *path;
GFile *file;
path = bg_pictures_source_get_cache_path ();
file = g_file_new_for_path (path);
g_free (path);
return file;
}
static gboolean
add_single_file (BgPicturesSource *bg_source,
GFile *file,
const gchar *content_type,
guint64 mtime,
GtkTreeRowReference **ret_row_ref)
{
CcBackgroundItem *item = NULL;
CcBackgroundItemFlags flags = 0;
GtkListStore *store;
GtkTreeIter iter;
GtkTreePath *path = NULL;
GtkTreeRowReference *row_ref = NULL;
cairo_surface_t *surface = NULL;
char *source_uri = NULL;
char *uri = NULL;
gboolean needs_download;
gboolean retval = FALSE;
GFile *pictures_dir, *cache_dir;
GrlMedia *media;
/* find png and jpeg files */
if (!content_type)
goto out;
if (!in_content_types (content_type))
goto out;
/* create a new CcBackgroundItem */
uri = g_file_get_uri (file);
pictures_dir = g_file_new_for_path (g_get_user_special_dir (G_USER_DIRECTORY_PICTURES));
cache_dir = bg_pictures_source_get_cache_file ();
needs_download = !g_file_has_parent (file, pictures_dir) &&
!g_file_has_parent (file, cache_dir);
g_object_unref (pictures_dir);
g_object_unref (cache_dir);
if (!needs_download)
{
source_uri = g_strdup (uri);
flags |= CC_BACKGROUND_ITEM_HAS_URI;
}
else
{
source_uri = uri;
uri = NULL;
}
item = cc_background_item_new (uri);
flags |= CC_BACKGROUND_ITEM_HAS_SHADING | CC_BACKGROUND_ITEM_HAS_PLACEMENT;
g_object_set (G_OBJECT (item),
"flags", flags,
"shading", G_DESKTOP_BACKGROUND_SHADING_SOLID,
"placement", G_DESKTOP_BACKGROUND_STYLE_ZOOM,
"modified", mtime,
"needs-download", needs_download,
"source-url", source_uri,
NULL);
if (!ret_row_ref && in_screenshot_types (content_type))
goto read_file;
surface = get_content_loading_icon (BG_SOURCE (bg_source));
store = bg_source_get_liststore (BG_SOURCE (bg_source));
/* insert the item into the liststore */
gtk_list_store_insert_with_values (store, &iter, -1,
0, surface,
1, item,
-1);
path = gtk_tree_model_get_path (GTK_TREE_MODEL (store), &iter);
row_ref = gtk_tree_row_reference_new (GTK_TREE_MODEL (store), path);
g_object_set_data_full (G_OBJECT (item), "row-ref", row_ref, (GDestroyNotify) gtk_tree_row_reference_free);
read_file:
media = g_object_get_data (G_OBJECT (file), "grl-media");
if (media == NULL)
{
g_object_set_data_full (G_OBJECT (file), "item", g_object_ref (item), g_object_unref);
g_file_read_async (file, G_PRIORITY_DEFAULT,
bg_source->priv->cancellable,
picture_opened_for_read, bg_source);
}
else
{
GFile *native_file;
GFile *thumbnail_file = NULL;
gchar *native_dir;
gchar *native_path;
const gchar *title;
const gchar *thumbnail_uri;
title = grl_media_get_title (media);
g_object_set (G_OBJECT (item), "name", title, NULL);
thumbnail_uri = grl_media_get_thumbnail (media);
thumbnail_file = g_file_new_for_uri (thumbnail_uri);
native_path = gnome_desktop_thumbnail_path_for_uri (source_uri, GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
native_file = g_file_new_for_path (native_path);
native_dir = g_path_get_dirname (native_path);
g_mkdir_with_parents (native_dir, USER_DIR_MODE);
g_object_set_data_full (G_OBJECT (thumbnail_file), "item", g_object_ref (item), g_object_unref);
g_object_set_data_full (G_OBJECT (thumbnail_file),
"native-file",
g_object_ref (native_file),
g_object_unref);
g_file_copy_async (thumbnail_file,
native_file,
G_FILE_COPY_ALL_METADATA,
G_PRIORITY_DEFAULT,
bg_source->priv->cancellable,
NULL,
NULL,
picture_copied_for_read,
bg_source);
g_clear_object (&thumbnail_file);
g_object_unref (native_file);
g_free (native_dir);
g_free (native_path);
}
retval = TRUE;
out:
if (ret_row_ref)
{
if (row_ref && retval != FALSE)
*ret_row_ref = gtk_tree_row_reference_copy (row_ref);
else
*ret_row_ref = NULL;
}
gtk_tree_path_free (path);
g_clear_pointer (&surface, (GDestroyNotify) cairo_surface_destroy);
g_clear_object (&item);
g_object_unref (file);
g_free (source_uri);
g_free (uri);
return retval;
}
static gboolean
add_single_file_from_info (BgPicturesSource *bg_source,
GFile *file,
GFileInfo *info,
GtkTreeRowReference **ret_row_ref)
{
const gchar *content_type;
guint64 mtime;
content_type = g_file_info_get_content_type (info);
mtime = g_file_info_get_attribute_uint64 (info, G_FILE_ATTRIBUTE_TIME_MODIFIED);
return add_single_file (bg_source, file, content_type, mtime, ret_row_ref);
}
static gboolean
add_single_file_from_media (BgPicturesSource *bg_source,
GFile *file,
GrlMedia *media)
{
GDateTime *mtime;
const gchar *content_type;
gint64 mtime_unix;
content_type = grl_media_get_mime (media);
/* only GRL_METADATA_KEY_CREATION_DATE is implemented in the Flickr
* plugin, GRL_METADATA_KEY_MODIFICATION_DATE is not
*/
mtime = grl_media_get_creation_date (media);
if (!mtime)
mtime = grl_media_get_modification_date (media);
if (mtime)
mtime_unix = g_date_time_to_unix (mtime);
else
mtime_unix = g_get_real_time () / G_USEC_PER_SEC;
return add_single_file (bg_source, file, content_type, (guint64) mtime_unix, NULL);
}
gboolean
bg_pictures_source_add (BgPicturesSource *bg_source,
const char *uri,
GtkTreeRowReference **ret_row_ref)
{
GFile *file;
GFileInfo *info;
gboolean retval;
file = g_file_new_for_uri (uri);
info = g_file_query_info (file, ATTRIBUTES, G_FILE_QUERY_INFO_NONE, NULL, NULL);
if (info == NULL)
return FALSE;
retval = add_single_file_from_info (bg_source, file, info, ret_row_ref);
return retval;
}
gboolean
bg_pictures_source_remove (BgPicturesSource *bg_source,
const char *uri)
{
GtkTreeModel *model;
GtkTreeIter iter;
gboolean cont;
gboolean retval;
retval = FALSE;
model = GTK_TREE_MODEL (bg_source_get_liststore (BG_SOURCE (bg_source)));
cont = gtk_tree_model_get_iter_first (model, &iter);
while (cont)
{
CcBackgroundItem *tmp_item;
const char *tmp_uri;
gtk_tree_model_get (model, &iter, 1, &tmp_item, -1);
tmp_uri = cc_background_item_get_uri (tmp_item);
if (g_str_equal (tmp_uri, uri))
{
char *uuid;
uuid = bg_pictures_source_get_unique_filename (uri);
g_hash_table_insert (bg_source->priv->known_items,
uuid, NULL);
gtk_list_store_remove (GTK_LIST_STORE (model), &iter);
retval = TRUE;
break;
}
g_object_unref (tmp_item);
cont = gtk_tree_model_iter_next (model, &iter);
}
return retval;
}
static int
file_sort_func (gconstpointer a,
gconstpointer b)
{
GFileInfo *file_a = G_FILE_INFO (a);
GFileInfo *file_b = G_FILE_INFO (b);
guint64 modified_a, modified_b;
modified_a = g_file_info_get_attribute_uint64 (file_a, G_FILE_ATTRIBUTE_TIME_MODIFIED);
modified_b = g_file_info_get_attribute_uint64 (file_b, G_FILE_ATTRIBUTE_TIME_MODIFIED);
return modified_b - modified_a;
}
static void
file_info_async_ready (GObject *source,
GAsyncResult *res,
gpointer user_data)
{
BgPicturesSource *bg_source;
GList *files, *l;
GError *err = NULL;
GFile *parent;
files = g_file_enumerator_next_files_finish (G_FILE_ENUMERATOR (source),
res,
&err);
if (err)
{
if (!g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning ("Could not get pictures file information: %s", err->message);
g_error_free (err);
g_list_foreach (files, (GFunc) g_object_unref, NULL);
g_list_free (files);
return;
}
bg_source = BG_PICTURES_SOURCE (user_data);
parent = g_file_enumerator_get_container (G_FILE_ENUMERATOR (source));
files = g_list_sort (files, file_sort_func);
/* iterate over the available files */
for (l = files; l; l = g_list_next (l))
{
GFileInfo *info = l->data;
GFile *file;
file = g_file_get_child (parent, g_file_info_get_name (info));
add_single_file_from_info (bg_source, file, info, NULL);
}
g_list_foreach (files, (GFunc) g_object_unref, NULL);
g_list_free (files);
}
static void
dir_enum_async_ready (GObject *source,
GAsyncResult *res,
gpointer user_data)
{
BgPicturesSourcePrivate *priv;
GFileEnumerator *enumerator;
GError *err = NULL;
enumerator = g_file_enumerate_children_finish (G_FILE (source), res, &err);
if (err)
{
if (!g_error_matches (err, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning ("Could not fill pictures source: %s", err->message);
g_error_free (err);
return;
}
priv = BG_PICTURES_SOURCE (user_data)->priv;
/* get the files */
g_file_enumerator_next_files_async (enumerator,
G_MAXINT,
G_PRIORITY_LOW,
priv->cancellable,
file_info_async_ready,
user_data);
g_object_unref (enumerator);
}
char *
bg_pictures_source_get_cache_path (void)
{
return g_build_filename (g_get_user_cache_dir (),
"gnome-control-center",
"backgrounds",
NULL);
}
static char *
bg_pictures_source_get_unique_filename (const char *uri)
{
GChecksum *csum;
char *ret;
csum = g_checksum_new (G_CHECKSUM_SHA256);
g_checksum_update (csum, (guchar *) uri, -1);
ret = g_strdup (g_checksum_get_string (csum));
g_checksum_free (csum);
return ret;
}
char *
bg_pictures_source_get_unique_path (const char *uri)
{
GFile *parent, *file;
char *cache_path;
char *filename;
char *ret;
cache_path = bg_pictures_source_get_cache_path ();
parent = g_file_new_for_path (cache_path);
g_free (cache_path);
filename = bg_pictures_source_get_unique_filename (uri);
file = g_file_get_child (parent, filename);
g_free (filename);
ret = g_file_get_path (file);
g_object_unref (file);
g_object_unref (parent);
return ret;
}
gboolean
bg_pictures_source_is_known (BgPicturesSource *bg_source,
const char *uri)
{
gboolean retval;
char *uuid;
uuid = bg_pictures_source_get_unique_filename (uri);
retval = (GPOINTER_TO_INT (g_hash_table_lookup (bg_source->priv->known_items, uuid)));
g_free (uuid);
return retval;
}
static int
sort_func (GtkTreeModel *model,
GtkTreeIter *a,
GtkTreeIter *b,
BgPicturesSource *bg_source)
{
CcBackgroundItem *item_a;
CcBackgroundItem *item_b;
guint64 modified_a;
guint64 modified_b;
int retval;
gtk_tree_model_get (model, a,
1, &item_a,
-1);
gtk_tree_model_get (model, b,
1, &item_b,
-1);
modified_a = cc_background_item_get_modified (item_a);
modified_b = cc_background_item_get_modified (item_b);
retval = modified_b - modified_a;
g_object_unref (item_a);
g_object_unref (item_b);
return retval;
}
static void
file_info_ready (GObject *object,
GAsyncResult *res,
gpointer user_data)
{
GFileInfo *info;
GError *error = NULL;
GFile *file = G_FILE (object);
info = g_file_query_info_finish (file, res, &error);
if (!info)
{
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
g_warning ("Problem looking up file info: %s", error->message);
g_clear_error (&error);
return;
}
/* Up the ref count so we can re-use the add_single_item code path which
* reduces the ref count.
*/
g_object_ref (file);
add_single_file_from_info (BG_PICTURES_SOURCE (user_data), file, info, NULL);
}
static void
file_added (GFile *file,
BgPicturesSource *self)
{
char *uri;
uri = g_file_get_uri (file);
if (!bg_pictures_source_is_known (self, uri))
{
g_file_query_info_async (file,
ATTRIBUTES,
G_FILE_QUERY_INFO_NONE,
G_PRIORITY_LOW,
NULL,
file_info_ready,
self);
}
g_free (uri);
}
static void
files_changed_cb (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
BgPicturesSource *self = BG_PICTURES_SOURCE (user_data);
char *uri;
switch (event_type)
{
case G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT:
file_added (file, self);
break;
case G_FILE_MONITOR_EVENT_DELETED:
uri = g_file_get_uri (file);
bg_pictures_source_remove (self, uri);
g_free (uri);
break;
default:
return;
}
}
static GFileMonitor *
monitor_path (BgPicturesSource *self,
const char *path)
{
GFileMonitor *monitor;
GFile *dir;
g_mkdir_with_parents (path, USER_DIR_MODE);
dir = g_file_new_for_path (path);
g_file_enumerate_children_async (dir,
ATTRIBUTES,
G_FILE_QUERY_INFO_NONE,
G_PRIORITY_LOW, self->priv->cancellable,
dir_enum_async_ready, self);
monitor = g_file_monitor_directory (dir,
G_FILE_MONITOR_NONE,
self->priv->cancellable,
NULL);
if (monitor)
g_signal_connect (monitor,
"changed",
G_CALLBACK (files_changed_cb),
self);
g_object_unref (dir);
return monitor;
}
static void
media_found_cb (BgPicturesSource *self, GrlMedia *media)
{
GFile *file = NULL;
const gchar *uri;
uri = grl_media_get_url (media);
file = g_file_new_for_uri (uri);
g_object_set_data_full (G_OBJECT (file), "grl-media", g_object_ref (media), g_object_unref);
add_single_file_from_media (self, file, media);
}
static void
bg_pictures_source_init (BgPicturesSource *self)
{
const gchar *pictures_path;
BgPicturesSourcePrivate *priv;
char *cache_path;
GtkListStore *store;
priv = self->priv = PICTURES_SOURCE_PRIVATE (self);
priv->cancellable = g_cancellable_new ();
priv->known_items = g_hash_table_new_full (g_str_hash,
g_str_equal,
(GDestroyNotify) g_free,
NULL);
pictures_path = g_get_user_special_dir (G_USER_DIRECTORY_PICTURES);
if (pictures_path == NULL)
pictures_path = g_get_home_dir ();
priv->picture_dir_monitor = monitor_path (self, pictures_path);
cache_path = bg_pictures_source_get_cache_path ();
priv->cache_dir_monitor = monitor_path (self, cache_path);
g_free (cache_path);
priv->grl_miner = cc_background_grilo_miner_new ();
g_signal_connect_swapped (priv->grl_miner, "media-found", G_CALLBACK (media_found_cb), self);
cc_background_grilo_miner_start (priv->grl_miner);
priv->thumb_factory =
gnome_desktop_thumbnail_factory_new (GNOME_DESKTOP_THUMBNAIL_SIZE_LARGE);
store = bg_source_get_liststore (BG_SOURCE (self));
gtk_tree_sortable_set_sort_func (GTK_TREE_SORTABLE (store),
1,
(GtkTreeIterCompareFunc)sort_func,
self,
NULL);
gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
1,
GTK_SORT_ASCENDING);
}
BgPicturesSource *
bg_pictures_source_new (GtkWindow *window)
{
return g_object_new (BG_TYPE_PICTURES_SOURCE, "window", window, NULL);
}
const char * const *
bg_pictures_get_support_content_types (void)
{
return content_types;
}
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